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<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <title>09_Vue实例_生命周期</title>
  </head>
  <body>
    <!--
1. vue对象的生命周期
  1). 初始化显示
    * beforeCreate()
    * created()
    * beforeMount()
    * mounted()
  2). 更新状态
    * beforeUpdate()
    * updated()
  3). 销毁vue实例: vm.$destory()
    * beforeDestory()
    * destoryed()
2. 常用的生命周期方法
  created()/mounted(): 发送ajax请求, 启动定时器等异步任务
  beforeDestory(): 做收尾工作, 如: 清除定时器
-->

    <div id="app">
      <button @click="$destroy()">卸载</button>
      <p v-show="isShow">来吧来呗!~~~</p>
    </div>

    <script type="text/javascript" src="../js/vue.js"></script>
    <script type="text/javascript">
      new Vue({
        el: '#app',
        data: {
          salary: 2000,
          isShow: true,
        },
        mounted() {
          this.timer = setInterval(() => {
            console.log(this)
            this.isShow = !this.isShow
          }, 1000)
        },
        destroyed(){
          clearInterval(this.timer)
        }
      })
    </script>
  </body>
</html>
